Crane got his hat-trick after the break and Thomas Waldrom added a sixth before two Treviso tries, but Hamilton, Manu Tuilagi and Steve Mafi crossed late on.
However, Irvine added that while Schumacher would still have the speed to be competitive, younger drivers such as Lewis Hamilton could have a psychological edge.
Hamilton, who made 48 but announced after the game that he was set to retire from international cricket, added 86 with Coetzer (51) for the second wicket after Ryan Watson fell in the first over, although the Scots were eventually dismissed for 211.